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Proper use of 'yield return'
...Another example that might be interesting is when reading rather large CSV files. You want to read each element but you also want to extract your dependency away. Yield returning an IEnumerable<> will allow you to return each row and process each row individually. No need to read a 10 Mb file ...
RequestDispatcher.forward() vs HttpServletResponse.sendRedirect()
...ess them using RequestDispatcher#forward().
You can for example have a JSP file in /WEB-INF/login.jsp and a LoginServlet which is mapped on an url-pattern of /login. When you invoke http://example.com/context/login, then the servlet's doGet() will be invoked. You can do any preprocessing stuff in th...
How to get current memory usage in android?
...ytes * 100 / nativeHeapSize
But I believe it might be best to use the profiler of the IDE, which shows the data in real time, using a graph.
So the good news on Android O is that it's much harder to get crashes due to OOM of storing too many large bitmaps, but the bad news is that I don't think ...
Python try…except comma vs 'as' in except
...bout other versions) the 'comma' syntax is not supported any more:
Source file exception_comma.py:
try:
result = 1/0
except Exception, e:
print("An error occurred")
exit(1)
exit(0)
$ python --version --> Python 2.7.10
$ python exception_comma.py
An error occurred
$ python3 ...
廉价共享存储解决方案1-drbd+ha+nfs - 更多技术 - 清泛网 - 专注C/C++及内核技术
...t/linux/enterprise/$releasever/en/os/SRPMS/
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
[rhel-source-beta]
name=Red Hat Enterprise Linux $releasever Beta - $basearch - Source
baseurl=ftp://ftp.redhat.com/pub/redhat/linux/beta/$releasever/en/os/SRPMS/
enab...
How to apply unmerged upstream pull requests from other forks into my fork?
...s unless there is no fork. For example: github.com/OculusVR/RakNet/pull/61/files
– Milan Babuškov
Apr 11 '16 at 10:53
...
Why dict.get(key) instead of dict[key]?
...is a practical example:
Say, you are calling an API, which returns a JOSN file you need to parse. The first JSON looks like following:
{"bids":{"id":16210506,"submitdate":"2011-10-16 15:53:25","submitdate_f":"10\/16\/2011 at 21:53 CEST","submitdate_f2":"p\u0159ed 2 lety","submitdate_ts":1318794805...
How to add a filter class in Spring Boot?
...t;/filter-mapping>
These will be the two beans in your @Configuration file
@Bean
public FilterRegistrationBean someFilterRegistration() {
FilterRegistrationBean registration = new FilterRegistrationBean();
registration.setFilter(someFilter());
registration.addUrlPatterns("/url/*")...
What is Vim recording and how can it be disabled?
...imes. Note that register '%' (name of the current
file) and '#' (name of the alternate file) cannot be
used. For "@=" you are prompted to enter an
expression. The result of the expression is then
execu...
How to list all properties of a PowerShell object
...
Get-WmiObject Win32_computersystem | fl *
It avoids the .format.ps1xml file that defines a table or list view for the object type, if there are any. The format file may even define column headers that don't match any property names.
...